VIDEO COMMUNICATION METHOD AND TERMINAL

Description

Field of the Invention

[0001] The present invention relates to the communication field, and particularly to a method for realizing visual communication and a terminal.

Background of the Invention

[0002] The videophone service is a multimedia communication service integrated with image and voice and can realize face-to-face and real time communication between people, i.e. the communication peer can view the scene of each other during communication. The description of this service can be made reference to 3GPP TS, H.324, H.245, and H.223.

[0003] The Bluetooth technology is commonly created by a Special Interest Group (abbreviated as SIG) consisting of the Ericsson company and companies such as Intel, IBM, Nokia, Toshiba, etc. From the Bluetooth 1.0 version issued in 1999 to the current Bluetooth 3.0 version, the Bluetooth technology has gone through flourishing development. Due to its unique and good features, the Bluetooth technology is prevailing in the world.

[0004] The current videophone service has to be realized by the common telephone network, and needs the support of the operator during the implementation, which will inevitably affect the application range of the videophone service.

[0005] US 2006/0203 083A1 provides a method for videoconference interaction with Bluetooth-enabled cellular telephone; however, above-mentioned problem still remains unsolved.

[0006] EP 2066093A1 provides a mobile communication terminal and signal relay method; however, above-mentioned problem still remains unsolved.

[0007] Radio Specification part A defines the requirements for a Bluetooth transceiver operating in this unlicensed band; however, above-mentioned problem still remains unsolved.

Summary of the Invention

[0008] The main object of the present invention is to provide a method for realizing visual communication and a terminal, so as to solve at least the above problems.

[0009] A method for realizing visual communication is provided according to one aspect of the present invention, comprising: the initiating terminal and the receiving terminal of the visual communication establishing a Bluetooth wireless communication link between the initiating terminal and the receiving terminal via the respective Bluetooth module thereof; and the initiating terminal and the receiving terminal transmit multimedia information via an established Bluetooth wireless communication link to carry out visual communication.

[0010] In an example embodiment, before the initiating terminal and the receiving terminal transmit multimedia information via the established Bluetooth wireless communication link, the method further comprises: the initiating terminal and the receiving terminal transmit control information to each other so as to indicate the an opposite end to adjust the transceiving power of the Bluetooth module thereof to a preset target value; and the initiating terminal and the receiving terminal transmitting multimedia information via the established Bluetooth wireless communication link comprises: the initiating terminal and the receiving terminal takes the preset target value indicated by the received control information as the current transceiving power of the Bluetooth module and transmit the multimedia information via the established Bluetooth wireless communication link.

[0011] In an example embodiment, the initiating terminal and the receiving terminal transmitting control information to each other so as to indicate the opposite end to adjust the transceiving power of the Bluetooth module thereof to the preset target value comprises: the initiating terminal sends a first control information to the receiving terminal to indicate the receiving terminal to adjust the transceiving power of the Bluetooth module of the receiving terminal to the preset target value indicated by the first control information; and when completing adjusting the transceiving power of the Bluetooth module of the receiving terminal to the preset target value indicated by the first control information, the receiving terminal sends a second control information to the initiating terminal to indicate the initiating terminal to adjust the transceiving power of the Bluetooth module of the initiating terminal to the preset target value indicated by the second control information.

[0012] In an example embodiment, the preset target value indicated by the control information is the maximum transceiving power of the Bluetooth module of a terminal which receives the control information.

[0013] In an example embodiment, the control information is sent by a link management protocol (LMP) entity of the Bluetooth module by an LMP protocol data unit (PDU).

[0014] In an example embodiment, the initiating terminal and the receiving terminal of the visual communication establishing a Bluetooth wireless communication link between the initiating terminal and the receiving terminal via the respective Bluetooth module thereof comprises: a video call control (VCC) entity in the Bluetooth module of the initiating terminal receives an instruction sent by an application of the initiating terminal for establishing the Bluetooth wireless communication link via an interface; the VCC entity controls a baseband layer to start up a process of query, paging, query scanning and paging scanning via an interface; and the VCC entity controls the LMP entity to establish and issue the Bluetooth wireless communication link with the receiving terminal via an interface.

[0015] In an example embodiment, the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out visual communication comprises: the VCC entity controls the connection of an internal visual path using a voice and video synchronization control interface, wherein the application on the established Bluetooth wireless communication link, the application transmits the multimedia information with an application of the receiving terminal via the internal visual path so as to carry out the visual communication.

[0016] In an example embodiment, before the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication, the method further comprises: the VCC entity feeds back a message that the Bluetooth wireless communication link is established successfully to the application of the initiating terminal; and the application of the initiating terminal and the application of the receiving terminal carry out peer layer multiplexing information interaction and a logical channel communication using an H.324 signaling.

[0017] In an example embodiment, after carrying out the visual communication, the method further comprises: the initiating terminal or the receiving terminal initiates a visual communication end command to the opposite end; removing the logical channel between the initiating terminal and the receiving terminal; and removing the Bluetooth wireless communication link between the initiating terminal and the receiving terminal.

[0018] In an example embodiment, the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

[0019] A terminal is provided according to another aspect of the present invention, comprising: a Bluetooth module, configured to interact with a Bluetooth module of an opposite end and establish a Bluetooth wireless communication link between the terminal and the opposite end; and a visual communication module, configured to transmit multimedia information via an established Bluetooth wireless communication link with the opposite end to carry out visual communication.

[0020] In an example embodiment, the terminal further comprises: a control transceiving module, configured to send to the opposite end a first control information indicating to adjust the transceiving power of the

[0021] Bluetooth module of the terminal to the preset target value from the terminal; and the visual communication module being configured to take the preset target value indicated by the second control information as a current transceiving power of the Bluetooth module of the terminal, and transmit the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication.

[0022] By way of the present invention, the initiating terminal and the receiving terminal establish a Bluetooth wireless communication link by means of the Bluetooth module thereof and transmit the multimedia information of the visual communication via the established Bluetooth wireless communication link to carry out the visual communication, it solves the problem in the related art that the visual communication needs the support of the operators which affects the application range of the videophone service, and enable two Bluetooth mobile phone in the same network to directly carry out the visual communication without the common telephone network. And this method effectively combines the Bluetooth technology and the low rate audio/video coding technology together with the feature that the connection and networking are flexible and diversified and the capability of transmitting via a low bandwidth channel.

Brief Description of the Drawings

[0023] The drawings illustrated here provide a further understanding of the present invention and form a part of the present application. The exemplary embodiments and the description thereof are used to explain the present invention without unduly limiting the scope of the present invention. In the drawings:

FIG. 1 is a flowchart of a method for realizing visual communication according to one embodiment of the present invention;

FIG. 2 is a structural block diagram of a terminal according to one embodiment of the present invention;

FIG. 3 is a preferred structural block diagram of a terminal according to one embodiment of the present invention;

FIG. 4 is a protocol frame diagram of realizing internal visual communication based on Bluetooth according to embodiment 1;

FIG. 5 is a flowchart of realizing internal visual communication based on Bluetooth according to embodiment 2; and

FIG. 6 is a flowchart of realizing internal visual communication based on Bluetooth according to embodiment 3.

Detailed Description of Embodiments

[0024] The present invention will be described hereinafter in detail with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other if there is no conflict.

[0025] FIG. 1 is a flowchart of a method for realizing visual communication according to one embodiments of the present invention, and the method comprises:

Step S102, a initiating terminal and a receiving terminal of the visual communication establish a Bluetooth wireless communication link between the initiating terminal and the receiving terminal via the respective Bluetooth module thereof; and

Step S104, the initiating terminal and the receiving terminal transmit multimedia information via an established Bluetooth wireless communication link to carry out the visual communication.

[0026] By way of the above method, the user can realize visual communication using Bluetooth without the common telephone network provided by the operator. In this method, the Bluetooth technology and the low rate audio/video coding technology are combined effectively with the feature that the connection and networking are flexible and diversified and the capability of transmitting via a low bandwidth channel. This technology is a further extension of the "three into one" application of Bluetooth. For example, in a building, it is an internal videophone which will charge no fee. Such free multimedia communication manner makes the communication more flexible and diversified.

[0027] The Bluetooth belongs to wireless transmission, and one of the features of the wireless channel is easy to attenuate, especially when encountering a barrier on the transmission path, for example, when being sheltered by objects such as wall, the attenuation is more obvious. In this case, the internal visual communication based on Bluetooth may be affected to a certain extent, phenomena such as asynchronous audio/video, blur video with mosaic, and even abnormal communication and so on may appear. For this end, the internal visual communication can be carried out normally by adding the transceiving power of the Bluetooth modules of the communication parties without adding hardware. In particular, before the initiating terminal and the receiving terminal transmit the multimedia information via the established Bluetooth wireless communication link, the initiating terminal and the receiving terminal can transmit the control information to each other so as to indicate the opposite end to adjust the transceiving power of the Bluetooth module thereof to a preset target value; and when the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link, the initiating terminal and the receiving terminal respectively takes the preset target value indicated by the received control information as the current transceiving power of the Bluetooth module and transmit the multimedia information via the established Bluetooth wireless communication link.

[0028] During particular implementation, the initiating terminal and the receiving terminal transmitting the control information to each other so as to indicate the opposite end to adjust the transceiving power of the Bluetooth module thereof to the preset target value can be carried out according to the following order: the initiating terminal sends the first control information to the receiving terminal to indicate the receiving terminal to adjust the transceiving power of the Bluetooth module of the receiving terminal to the preset target value indicated by the first control information; and when completing adjusting the transceiving power of the Bluetooth module of the receiving terminal as the preset target value indicated by the first control information, the receiving terminal sends the second control information to the initiating terminal to indicate the initiating terminal to adjust the transceiving power of the Bluetooth module of the initiating terminal to the preset target value indicated by the second control information.

[0029] In this case, the preset target value indicated by the control information is the maximum transceiving power of the Bluetooth module of the terminal which receives the control information, and this manner can ensure the quality of the visual communication as much as possible without introducing complex judgment process.

[0030] According to the protocol specification of SIG, after the Bluetooth wireless communication link is established successfully, the link management protocol (abbreviated as LMP) entities of the Bluetooth modules of the communication parties can control the transceiving powers of the Bluetooth modules of the parties by interacting of the LMP PDU, that is to say, the above control information can be sent by the LMP entity of the Bluetooth module via the LMP protocol data unit (abbreviated as PDU). Based on the above specification, in the situation which the preset target value is the maximum transceiving power of the Bluetooth module, after the Bluetooth wireless communication link is established successfully, the initiator of the internal visual communication sends the corresponding PDU to the receiver to request to increase the power until the receiver reaches the maximum power; then, the receiver sends the corresponding PDU to the sender to request to increase the power until the sender reaches the maximum power. Afterwards, the visual communication PDU can be transmitted. During the internal visual communication, the powers of the initiator and receiver are kept under the maximum value so as to insure carrying out communication normally. During particular implementation, the entire internal visual communication can be carried out by multiplexing the existing Internet protocol and the architecture thereof, for this end, a video call control (abbreviated as VCC) entity can be newly added to control the entire visual communication process, wherein:

the initiating terminal and the receiving terminal of the visual communication establishing a Bluetooth wireless communication link between the initiating terminal and the receiving terminal via the respective Bluetooth module thereof comprises: a video call control (VCC) entity in the Bluetooth module of the initiating terminal receives an instruction sent by an application of the initiating terminal for establishing the Bluetooth wireless communication link via an interface; the VCC entity controls the baseband layer to start up the process of query, paging, query scanning and paging scanning via an interface; and the VCC entity controls the LMP entity to establish and issue the Bluetooth wireless communication link with the receiving terminal via an interface.

[0031] The initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication comprises: the VCC entity controls the connection of an internal visual path using a voice and video synchronization control interface, the application is on the established Bluetooth wireless communication link, the application transmits the multimedia information with an application of the receiving terminal via the internal visual path so as to carry out the visual communication.

[0032] Before the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication, the VCC entity feeds back a message that the Bluetooth wireless communication link is established successfully to the application of the initiating terminal; and the application of the initiating terminal and the application of the receiving terminal carry out peer layer multiplexing information interaction and the logical channel communication using an H.324 signaling. After carrying out the visual communication, one of the initiating terminal and the receiving terminal can initiate a visual communication end command to the peer, and when being ended, the logical channel between the initiating terminal and the receiving terminal can be first removed, and then the Bluetooth wireless communication link between the initiating terminal and the receiving terminal can be removed.

[0033] In the current specification, the Bluetooth supports 2 different kinds of links: synchronous connection-oriented (abbreviated as SCO) and asynchronous connection-less (abbreviated as ACL). Wherein, SCO is a synchronous connection-oriented link, and 2 devices carry out synchronous communication using the reserved bandwidth, which is similar to circuit switch. SCO grouping is mainly used for real-time service, and the information transmission rate reaches 64 kbit/s. Both the master device and slave device can establish up to 3 SCO links. ACL is a asynchronous connectionless-oriented link, and the master device can establish an ACL link based on each slot for any slave device in the non-SCO link reserved slot. The asymmetric connection positive rate of the ACL is 72.164 kbit/s, the negative response rate is 57.664 kbit/s, and the symmetric connection rate is 432.664 kbit/s.

[0034] The video signal transmitted in real-time has relatively high requirements on the selection of the link: 1, the transmission rate has to be ensured; and 2. there should be less delay. Although the transmission rate of the ACL manner is relative high, it may cause relatively large delay since it is similar to the features of packet transmission and the error retransmission mechanism. However, although the SCO manner only has a transmission rate of 64 kbit/s, it is enough for use regarding the multimedia information compressed by H.263. Moreover, the synchronization feature of the SCO manner more meets the transmission requirements of the real-time signal, therefore, the multimedia information can be transmitted in the manner of SCO.

[0035] FIG. 2 is a structural block diagram of a terminal according to one embodiments of the present invention, and the terminal comprises: a Bluetooth module 22, is configured to interact with the Bluetooth module 22 of the opposite end and establish a Bluetooth wireless communication link between the terminal and the opposite end; and a visual communication module 24, is configured to transmit the multimedia information via the established Bluetooth wireless communication link with the opposite end to carry out the visual communication.

[0036] FIG. 3 is a preferred structural block diagram of a terminal according to one embodiments of the present invention, and this terminal can further comprises: a control transceiving module 32, is configured to send to the opposite end a first control information indicating to adjust the transceiving power of the Bluetooth module 22 of the opposite end to a preset target value and receive a second control information indicating to adjust the transceiving power of the Bluetooth module 22 of the terminal to the preset target value from the terminal; and the visual communication module 24, is configured to take the preset target value indicated by the second control information as the current transceiving power of the Bluetooth module of the terminal and transmit the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication.

[0037] Embodiments 1 to 3 described hereinafter are integrated with the technical solutions of a plurality of above preferred embodiments.

Embodiment 1

[0038] FIG. 4 is a frame diagram of a protocol realizing internal visual communication based on Bluetooth according to embodiment 1. Detailed description is as follows:

H.223: H.223 is mainly responsible for the multiplexing and de-multiplexing of the video logical channel, voice logical channel, signaling logical channel, and data logical channel. It holds a channel multiplexing table and transmits the same to the opposite end. It multiplexes an audio/video control data stream into a single bit data stream and de-multiplexes the received single bit data stream into various multimedia streams. In addition, it executes logic frame, number order, error detection and error correction based on relay, which are suitable for every media type.

H.245: H.245 is used for controlling videophone signaling, which mainly completes capability information of exchange with the far end user, master and slave decision(s), video quality control, channel multiplexing table transfer, etc.

H.324: it controls and coordinates the H.223 and H.245 protocols and realizes the call initiated by the upper layer application.

[0039] Hereinafter, six interfaces identified in FIG. 4 will be described simply:

interface A, the video call control entity connects and disconnects the internal path using this voice and video synchronization control interface.

Interface B is used for transmitting the TCS information on the connection-oriented (point to point) L2CAP channel.

Interface C, the video call control entity directly controls a link manager to establish and issue an SCO link using this interface.

Interface D, the video call control entity controls the LC/baseband using this interface so as to directly start up the query, paging, query scanning and paging scanning process.

Interface E, the video call application notifies the video call control entity to establish a communication link using this interface.

[0040] The video call control (VCC) entity and the H.223 and H.245 as well as the H.324 protocols have a relationship of upper layer protocol and lower layer transmission entity. The function thereof is to establish a Bluetooth radio bearer for transmitting an H.324 protocol data packet, the H.324 protocol data packet includes video, audio, data and multimedia signaling. If the user wants to dial a Bluetooth based internal videophone, he has to first establish a Bluetooth radio link via the VCC, then can establish a multimedia signaling, and then can carry out video transmission after the multimedia signaling is interacted successfully. The particular interaction process is as follows:

1. the user dials the internal videophone, and this upper layer application sends an instruction to the VCC via the interface E to instruct the VCC to establish a Bluetooth link;

2. the VCC entity controls the baseband layer via the interface D to start up the process of query, paging, query scanning and paging scanning;

3. after the above processes are completed, the VCC directly controls the link manager to establish and issue an SCO link via the interface C, and after the establishment of the link is completed, the VCC feeds back a message that the link is established successfully to the upper layer application to indicate that the interaction of the multimedia control signaling can be carried out; and

4. as a result of the interaction of the multimedia control signaling, the VCC connects the internal visual path using the interface A, and after the internal visual communication is ended, the VCC disconnects the internal visual path using the interface A.

Embodiment 2

[0041] During the process of realizing visual internal communication based on Bluetooth, a communication link is established by way of the signaling interaction between the Bluetooth wireless protocol stack communication entities shown in FIG. 4, after the communication link is established, the H.245 signaling is started to be executed: the exchange of the multiplexing level is carried out at the peer to peer and the logical channel is opened, so as to carry out the transmission of the multimedia information. FIG. 5 is a flowchart of realizing internal visual communication based on Bluetooth according to embodiment 2. Detailed description is as follows:

In step S502, the user A (marked as UE (A)) sends a connection request (abbreviated as Conn Req) command to the Bluetooth module (BT (A)) thereof to prepare to establish an internal visual communication link with the user B (marked as UE (B)).

In step S504, the Bluetooth modules interact signaling so as to establish a Bluetooth link and configure the same. If the Bluetooth link is established and configured successfully, the Bluetooth module A encapsulates the connection request PDU of the upper layer and sends the same to the Bluetooth module B (marked as BT (B)). The Bluetooth module B transfers the connection request PDU to the upper layer and transfers the connection accept PDU of the upper layer to the Bluetooth module A. The Bluetooth module A transfers the connection accept PDU to the upper layer, which identifies that the internal visual communication link is established successfully.

In step S506, after the Bluetooth wireless channel connection is established, the Bluetooth module A sends an LMP increase power request (LMP_incr_power_req) PDU to the Bluetooth module B to request the same to enhance the power, and this process continues until the LMP maximum power (LMP_max_power) PDU sent by the Bluetooth module B is received, which indicates that the maximum power is already in using, and the Bluetooth module B also carries out the corresponding action until the Bluetooth module A uses the maximum power.

In step S508, after the powers of the communication parties are determined, two terminals start to carry out peer layer multiplexing information interaction and logical channel communication using the H.324 signaling, and the particular signaling flow is as shown in FIG. 5, first, the two parties exchange the terminal system capability thereof by way of a terminal capability set message, then a random number is exchanged by sending a maser slave determination message to determine the master and slave, then, the logical channel is opened using the open logical channel signaling, the multiplexing table can be sent after the logical channel is opened, and the actual data transmission can be started on the logical channel only after the multiplexing table is defined successfully. The PDU interacted between the Bluetooth modules is to encapsulate and de-encapsulate the above signaling. After the interaction of the H.324 signaling is completed, the internal visual communication can be started.

In step S510, the user A sends out an internal visual communication end command----End session. First, the logical communication channel of the higher layer is removed, then the Bluetooth wireless link is removed, which identifies that the internal visual communication is ended normally.

Embodiment 3

[0042] FIG. 6 is a flowchart of realizing internal visual communication by way of Bluetooth according to embodiment 3, and this process includes:

In step S602, the user A initiates internal visual communication with the user B.

In step S604, the upper layer application sends a connection establish command to the Bluetooth module, and the Bluetooth wireless link is established successfully.

[0043] Bluetooth mobile phone can directly carry out internal visual communication by way of Bluetooth.

[0044] Apparently, those skilled in the art shall understand that the above-mentioned modules and steps of the present invention can be realized by using general purpose calculating device, can be integrated in one calculating device or distributed on a network which consists of a plurality of calculating devices, and alternatively they can be realized by using the executable program code of the calculating device, so that consequently they can be stored in the storing device and executed by the calculating device, or they are made into integrated circuit module respectively, or a plurality of modules or steps thereof are made into one integrated circuit module. In this way, the present invention is not restricted to any particular hardware and software combination.

Claims

1. A method for realizing visual communication, characterized by comprising:

an initiating terminal and a receiving terminal of the visual communication establishing a Bluetooth wireless communication link between the initiating terminal and the receiving terminal via respective Bluetooth module thereof; and

the initiating terminal and the receiving terminal transmitting multimedia information via the established Bluetooth wireless communication link to carry out the visual communication;

wherein, before the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link, the method further comprises: the initiating terminal and the receiving terminal transmitting control information to each other so as to indicate the opposite end to adjust a transceiving power of the Bluetooth module thereof to a preset target value; wherein the preset target value indicated by the control information is the maximum transceiving power of the Bluetooth module of the terminal which receives the control information.

2. The method according to Claim 1, characterized in that,
the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link comprises: the initiating terminal and the receiving terminal taking the preset target value indicated by the received control information as a current transceiving power of the Bluetooth module and transmitting the multimedia information via the established Bluetooth wireless communication link.

3. The method according to Claim 2, characterized in that the initiating terminal and the receiving terminal transmitting the control information to each other so as to indicate the opposite end to adjust the transceiving power of the Bluetooth module thereof to the preset target value comprises:

the initiating terminal sending a first control information to the receiving terminal to indicate the receiving terminal to adjust the transceiving power of the Bluetooth module of the receiving terminal to the preset target value indicated by the first control information; and

when adjusting the transceiving power of the Bluetooth module of the receiving terminal to the preset target value indicated by the first control information is completed, the receiving terminal sending a second control information to the initiating terminal to indicate the initiating terminal to adjust the transceiving power of the Bluetooth module of the initiating terminal to the preset target value indicated by the second control information.

4. The method according to Claim 2 or 3, characterized in that the preset target value indicated by the control information is the maximum transceiving power of the Bluetooth module of the terminal which receives the control information.

5. The method according to Claim 2 or 3, characterized in that the control information is sent by a link management protocol (LMP) entity of the Bluetooth module via an LMP protocol data unit (PDU).

6. The method according to Claim 1, characterized in that the initiating terminal and the receiving terminal of the visual communication establishing the Bluetooth wireless communication link between the initiating terminal and the receiving terminal via the respective Bluetooth module thereof comprises:

a video call control (VCC) entity in the Bluetooth module of the initiating terminal receiving an instruction sent by an application of the initiating terminal for establishing the Bluetooth wireless communication link via an interface;

the VCC entity controlling a baseband layer to start up a process of query, paging, query scanning and paging scanning via the interface; and

the VCC entity controlling the LMP entity to establish and issue the Bluetooth wireless communication link with the receiving terminal via the interface.

7. The method according to Claim 6, characterized in that the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication comprises:

the VCC entity controlling a connection of an internal visual path by using a voice and video synchronization control interface, wherein the application is on the established Bluetooth wireless communication link, the application transmitting the multimedia information with an application of the receiving terminal via the internal visual path so as to carry out the visual communication.

8. The method according to Claim 6, characterized in that before the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication, the method further comprises:

the VCC entity feeding back a message that the Bluetooth wireless communication link is established successfully to the application of the initiating terminal; and

the application of the initiating terminal and the application of the receiving terminal carrying out an opposite layer multiplexing information interaction and a logical channel communication using an H.324 signaling.

9. The method according to Claim 8, characterized in that after carrying out the visual communication, the method further comprises:

the initiating terminal or the receiving terminal initiating a visual communication end command to the opposite end;

removing the logical channel between the initiating terminal and the receiving terminal; and

removing the Bluetooth wireless communication link between the initiating terminal and the receiving terminal.

10. The method according to any one of Claims 1 to 3 and 6 to 9, characterized in that the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

11. A terminal, characterized by comprising:

a Bluetooth module, configured to interact with a Bluetooth module of an opposite end and establish a Bluetooth wireless communication link between the terminal and the opposite end; and

a visual communication module, configured to transmit multimedia information via the established Bluetooth wireless communication link with the opposite end to carry out visual communication;

wherein the terminal further comprises: a control transceiving module, configured to send to the opposite end a first control information indicating to adjust a transceiving power of the Bluetooth module of the opposite end to a preset target value, and receive from the terminal a second control information indicating to adjust a transceiving power of the Bluetooth module of the terminal to the preset target value;

wherein the preset target value indicated by the control information is the maximum transceiving power of the Bluetooth module of the terminal which receives the control information; and

the visual communication module, configured to take the preset target value indicated by the second control information as a current transceiving power of the Bluetooth module of the terminal, and transmit the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication.

Ansprüche

1. Verfahren zur Realisierung visueller Kommunikation, dadurch gekennzeichnet, dass es umfasst:

Herstellen durch ein initiierendes Endgerät und ein empfangendes Endgerät der visuellen Kommunikation einer drahtlosen Bluetooth-Kommunikationsverbindung zwischen dem initiierenden Endgerät und dem empfangenden Endgerät über ein jeweiliges Bluetooth-Modul davon,

wobei das initiierende Endgerät und das empfangende Endgerät multimediale Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung übermitteln, um die visuelle Kommunikation durchzuführen,

wobei das Verfahren zudem Folgendes umfasst, bevor das initiierende Endgerät und das empfangende Endgerät die multimedialen Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung übermitteln: Übermitteln von Kontrollinformationen aneinander durch das initiierende Endgerät und das empfangende Endgerät, sodass dem anderen Ende angegeben wird, eine Sende-/Empfangsleistung dessen Bluetooth-Moduls auf einen vorgegebenen Sollwert einzustellen,

wobei der von den Kontrollinformationen angegebene vorgegebene Sollwert die maximale Sende-/Empfangsleistung des Bluetooth-Moduls des Endgeräts ist, das die Kontrollinformationen empfängt.

2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Übermitteln der multimedialen Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung durch das initiierende Endgerät und das empfangende Endgerät umfasst: das Heranziehen des von den empfangenen Kontrollinformationen angegebenen vorgegebenen Sollwerts durch das initiierende Endgerät und das empfangende Endgerät als aktuelle Sende-/Empfangsleistung des Bluetooth-Moduls und das Übermitteln der multimedialen Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung.

3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Übermitteln der Kontrollinformationen aneinander durch das initiierende Endgerät und das empfangende Endgerät, sodass dem anderen Ende angegeben wird, die Sende-/Empfangsleistung dessen Bluetooth-Moduls auf den vorgegebenen Sollwert einzustellen, umfasst:

Senden einer ersten Kontrollinformation durch das initiierende Endgerät an das empfangende Endgerät, um dem empfangenden Endgerät anzugeben, die Sende-/Empfangsleistung des Bluetooth-Moduls des empfangenden Endgeräts auf den von der ersten Kontrollinformation angegebenen vorgegebenen Sollwert einzustellen, und

Senden einer zweiten Kontrollinformation durch das empfangende Endgerät an das initiierende Endgerät, um dem initiierenden Endgerät anzugeben, die Sende-/Empfangsleistung des Bluetooth-Moduls des initiierenden Endgeräts auf den von der zweiten Kontrollinformation angegebenen vorgegebenen Sollwert einzustellen, nachdem das Einstellen der Sende-/Empfangsleistung des Bluetooth-Moduls des empfangenden Endgeräts auf den von der ersten Kontrollinformation angegebenen vorgegebenen Sollwert abgeschlossen wurde.

4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der von den Kontrollinformationen angegebene vorgegebene Sollwert die maximale Sende-/Empfangsleistung des Bluetooth-Moduls des Endgeräts ist, das die Kontrollinformationen empfängt.

5. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Kontrollinformationen durch eine Linkmanagementprotokoll-Einheit (LMP) des Bluetooth-Moduls über eine LMP-Protokolldateneinheit (PDU) gesendet werden.

6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Herstellen der drahtlosen Bluetooth-Kommunikationsverbindung zwischen dem initiierenden Endgerät und dem empfangenden Endgerät über das jeweilige Bluetooth-Modul davon durch das initiierende Endgerät und das empfangende Endgerät der visuellen Kommunikation umfasst:

Empfangen einer mittels einer Anwendung des initiierenden Endgeräts gesendeten Anweisung durch eine Videoanrufsteuereinheit (VCC) im Bluetooth-Modul des initiierenden Endgeräts zur Herstellung der drahtlosen Bluetooth-Kommunikationsverbindung über eine Schnittstelle,

wobei die VCC-Einheit einen Baseband Layer steuert, um einen Prozess für Anfrage, Paging, Anfrage-Scanning und Paging-Scanning über die Schnittstelle zu starten und

die VCC-Einheit die LMP-Einheit steuert, um die drahtlose Bluetooth-Kommunikationsverbindung mit dem empfangenden Endgerät über die Schnittstelle herzustellen und auszugeben.

7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das Übermitteln der multimedialen Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung durch das initiierende Endgerät und das empfangende Endgerät, um die visuelle Kommunikation durchzuführen, umfasst:

das Überwachen einer Verbindung eines internen visuellen Pfads durch die Nutzung einer Stimm- und Videosynchronisationskontrollschnittstelle durch die VCC-Einheit, wobei sich die Anwendung auf der hergestellten drahtlosen Bluetooth-Kommunikationsverbindung befindet und die Anwendung die multimedialen Informationen mit einer Anwendung des empfangenden Endgeräts über den internen visuellen Pfad übermittelt, sodass die visuelle Kommunikation durchgeführt wird.

8. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das Verfahren vor dem Übermitteln der multimedialen Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung durch das initiierende Endgerät und das empfangende Endgerät, um die visuelle Kommunikation durchzuführen zudem umfasst:

das Rückmelden einer Meldung durch die VCC-Einheit, dass die drahtlose Bluetooth-Kommunikationsverbindung erfolgreich hergestellt wurde, an die Anwendung des initiierenden Endgeräts und

das Durchführen einer entgegengesetzten Layer-Multiplexing-Informationsinteraktion und einer Logikkanalkommunikation unter Verwendung eines H.324-Signals durch die Anwendung des initiierenden Endgeräts und die Anwendung des empfangenden Endgeräts.

9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Verfahren nach dem Durchführen der visuellen Kommunikation zudem umfasst:

Initiieren eines Befehls für das Ende der visuellen Kommunikation an das andere Ende durch das initiierende Endgerät oder das empfangende Endgerät;

Beseitigen des Logikkanals zwischen dem initiierenden Endgerät und dem empfangenden Endgerät und

Beseitigen der drahtlosen Bluetooth-Kommunikationsverbindung zwischen dem initiierenden Endgerät und dem empfangenden Endgerät.

10. Verfahren nach einem der Ansprüche 1 bis 3 und 6 bis 9, dadurch gekennzeichnet, dass die drahtlose Bluetooth-Kommunikationsverbindung eine leitungsvermittelte synchrone Verbindung (SCO) ist.

11. Endgerät, dadurch gekennzeichnet, dass es umfasst:

ein Bluetooth-Modul, das ausgelegt ist, um mit einem Bluetooth-Modul eines anderen Endes zu interagieren und

eine drahtlose Bluetooth-Kommunikationsverbindung zwischen dem Endgerät und dem anderen Ende herzustellen;

ein visuelles Kommunikationsmodul, das ausgelegt ist, um multimediale Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung mit dem anderen Ende zu übermitteln, um eine visuelle Kommunikation durchzuführen,

wobei das Endgerät zudem umfasst: ein Steuersende-/-empfangsmodul, das ausgelegt ist, um dem anderen Ende eine erste Kontrollinformation zu senden, die angibt,

dass eine Sende-/Empfangsleistung des Bluetooth-Moduls des anderen Endes auf einen vorgegebenen Sollwert eingestellt werden soll, und um vom Endgerät eine zweite Kontrollinformation zu empfangen, die angibt,

dass eine Sende-/Empfangsleistung des Bluetooth-Moduls des Endgeräts auf den vorgegebenen Sollwert eingestellt werden soll,

wobei der von den Kontrollinformationen angegebene vorgegebene Sollwert die maximale Sende-/Empfangsleistung des Bluetooth-Moduls des Endgeräts ist, das die Kontrollinformationen empfängt; und

das visuelle Kommunikationsmodul, das ausgelegt ist, um den von der zweiten Kontrollinformation angegebenen vorgegebenen Sollwert als aktuelle Sende-/Empfangsleistung des Bluetooth-Moduls des Endgeräts heranzuziehen und die multimedialen Informationen über die hergestellte drahtlose Bluetooth-Kommunikationsverbindung zu übermitteln, um die visuelle Kommunikation durchzuführen.

Revendications

1. Procédé de réalisation d'une communication visuelle, caractérisé en ce qu'il comprend :

un terminal initiateur et un terminal récepteur de la communication visuelle établissant une liaison de communication sans fil Bluetooth entre le terminal initiateur et le terminal récepteur via le module Bluetooth respectif de ceux-ci, et

le terminal initiateur et le terminal récepteur transmettant des informations multimédias via la liaison de communication sans fil Bluetooth établie pour effectuer la communication visuelle ;

dans lequel, avant que le terminal initiateur et le terminal récepteur ne transmettent les informations multimédias via la liaison de communication sans fil Bluetooth établie, le procédé comprend de plus : le terminal initiateur et le terminal récepteur se transmettant réciproquement des informations de contrôle de sorte à indiquer à l'extrémité opposée de syntoniser une puissance émettrice/réceptrice dudit module Bluetooth à une valeur cible préétablie ; dans lequel la valeur cible préétablie indiquée par l'information de contrôle est la puissance émettrice/réceptrice maximum du module Bluetooth du terminal qui reçoit l'information de contrôle.

2. Procédé selon la revendication 1, caractérisé en ce que le terminal initiateur et le terminal récepteur transmettant les informations multimédias via la liaison de communication sans fil Bluetooth établie comprennent : le terminal initiateur et le terminal récepteur prenant la valeur cible préétablie indiquée par l'information de contrôle reçue comme étant une puissance émettrice/réceptrice actuelle du module Bluetooth et transmettant les informations multimédias via la liaison de communication sans fil Bluetooth établie.

3. Procédé selon la revendication 2, caractérisé en ce que le terminal initiateur et le terminal récepteur se transmettant réciproquement les informations de contrôle de sorte à indiquer à l'extrémité opposée de syntoniser la puissance émettrice/réceptrice dudit module Bluetooth avec la valeur cible préétablie comprennent :

l'envoi par le terminal initiateur d'une première information de contrôle au terminal récepteur pour indiquer au terminal récepteur de syntoniser la puissance émettrice/réceptrice du module Bluetooth du terminal récepteur à la valeur cible préétablie indiquée par la première information de contrôle ; et lorsque la syntonisation de la puissance émettrice/réceptrice du module Bluetooth du terminal récepteur à la valeur cible préétablie indiquée par la première information de contrôle est terminée, le terminal récepteur envoie une seconde information de contrôle au terminal initiateur pour indiquer au terminal initiateur de syntoniser la puissance émettrice/réceptrice du module Bluetooth du terminal initiateur à la valeur cible préétablie indiquée par la seconde information de contrôle.

4. Procédé selon la revendication 2 ou 3, caractérisé en ce que la valeur cible préétablie indiquée par l'information de contrôle est la puissance émettrice/réceptrice maximum du module Bluetooth du terminal qui reçoit l'information de contrôle.

5. Procédé selon la revendication 2 ou 3, caractérisé en ce que l'information de contrôle est envoyée par une entité de protocole de gestion de liaison (LMP) du module Bluetooth via une unité de données de protocole (PDU) de LMP.

6. Procédé selon la revendication 1, caractérisé en ce que le terminal initiateur et le terminal récepteur de la communication visuelle établissant la liaison de communication sans fil Bluetooth entre le terminal initiateur et le terminal récepteur via leur module Bluetooth respectif comprennent :

une entité de contrôle d'appel vidéo (VCC) dans le module Bluetooth du terminal initiateur recevant une instruction envoyée par une application du terminal initiateur pour établir la liaison de communication sans fil Bluetooth via l'interface ;

l'entité VCC contrôlant une couche bande de base pour démarrer un traitement de requête, de pagination,

d'analyse de requête et d'analyse de pagination via l'interface ; et

l'entité VCC contrôlant l'entité LMP pour établir et fournir la liaison de communication sans fil Bluetooth avec le terminal récepteur via l'interface.

7. Procédé selon la revendication 6, caractérisé en ce que le terminal initiateur et le terminal récepteur transmettant les informations multimédias via la liaison de communication sans fil Bluetooth établie pour effectuer la communication visuelle comprennent .
l'entité VCC contrôlant une connexion d'une voie optique interne en utilisant une interface de contrôle de synchronisation vocale et vidéo, dans lequel l'application est sur la liaison de communication sans fil Bluetooth établie, l'application transmettant les informations multimédias avec une application du terminal récepteur via la voie optique interne de manière à effectuer la communication visuelle.

8. Procédé selon la revendication 6, caractérisé en ce que, avant que le terminal initiateur et le terminal récepteur ne transmettent les informations multimédias via la liaison de communication sans fil Bluetooth établie pour effectuer la communication visuelle, le procédé comprend de plus :

l'entité VCC retransmettant, à l'application du terminal initiateur, un message indiquant que la liaison de communication sans fil Bluetooth a été établie avec succès ; et

l'application du terminal initiateur ainsi que l'application du terminal récepteur effectuant une interaction des informations de multiplexage de la couche opposée et une communication du canal logique en utilisant une signalisation H.324.

9. Procédé selon la revendication 8, caractérisé en ce qu'après avoir effectué la communication visuelle, le procédé comprend de plus :

le terminal initiateur ou le terminal récepteur initiant une commande de fin de communication visuelle à l'extrémité opposée ;

la coupure du canal logique entre le terminal initiateur et le terminal récepteur ; et

la coupure de la liaison de communication sans fil Bluetooth entre le terminal initiateur et le terminal récepteur.

10. Procédé selon l'une quelconque des revendications de 1 à 3 et de 6 à 9, caractérisé en ce que la liaison de communication sans fil Bluetooth est une liaison orientée à connexion synchrone (SCO).

11. Terminal, caractérisé en ce qu'il comprend :

un module Bluetooth configuré pour interagir avec un module Bluetooth d'une extrémité opposée et établir une liaison de communication sans fil Bluetooth entre le terminal et l'extrémité opposée ; et

un module de communication visuelle configuré pour transmettre des informations multimédias via la liaison de communication sans fil Bluetooth établie avec l'extrémité opposée pour effectuer la communication visuelle ;

dans lequel le terminal comprend de plus : un module émetteur/récepteur de contrôle configuré pour envoyer à l'extrémité opposée une première information de contrôle indiquant de syntoniser une puissance émettrice/réceptrice du module Bluetooth de l'extrémité opposée à une valeur cible préétablie, et recevoir du terminal une seconde information de contrôle indiquant de syntoniser une puissance émettrice/réceptrice du module Bluetooth du terminal à une valeur cible préétablie ;

dans lequel la valeur cible préétablie indiquée par l'information de contrôle est la puissance émettrice/réceptrice maximum du module Bluetooth du terminal recevant l'information de contrôle ; et

le module de communication visuelle est configuré pour prendre la valeur cible préétablie indiquée par la seconde information de contrôle comme étant une puissance émettrice/réceptrice actuelle du module Bluetooth du terminal, et transmettre les informations multimédias via la liaison de communication sans fil Bluetooth établie pour effectuer la communication visuelle.

Drawing